Buffer overflow in Artifex Mupdf
CVE-2026-7233
A vulnerability was determined in Artifex MuPDF up to 1.28.0. The impacted element is the function fz_subset_cff_for_gids of the file subset-cff.c of the component CFF Index Handler. This manipulation causes out-of-bounds read. The attack can only be executed locally. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through a bug report but has not responded yet.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (8.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: -0.000
Affected products
- Artifex Mupdf — versions 1.0, 1.1, 1.2
Weakness classification (CWE)
References
- vuldb.com/vuln/359840 (Exploit, technical-description, VDB Entry, Third Party Advisory, Mitigation, vdb-entry)
- vuldb.com/vuln/359840/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/submit/802590 (Exploit, VDB Entry, Third Party Advisory, Mitigation, third-party-advisory)
- bugs.ghostscript.com/show_bug.cgi (issue-tracking, Exploit, Third Party Advisory, Mitigation)
- github.com/biniamf/pocs/tree/main/mupdf-cff-indexload-oobread (Exploit, exploit)
- artifex.com/ (Product, product)
Frequently asked questions
- What is CVE-2026-7233?
- CVE-2026-7233 is a low-severity vulnerability in Artifex Mupdf, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 3.3/10. Published 2026-04-28.
- How severe is CVE-2026-7233?
- Low severity. CVSS v3 base score is 3.3 out of 10.